There's a problem. No.

According to the buoyancy of the bottom surface of the container which is not in close contact, F =ρgV, and =1.0 *103 *10 * 80 *10-6 = 0.8n.

The bottom surface is not in close contact with the bottom container. Water pressure at the bottom:

f 1 = rhoghs = 1.0 * 10 3 * kg/m 3 * 10n/kg * 5 * 10-2m * 10 * 10。

So the required buoyancy: 0.8N-0.5N = 0.3N